--- /dev/null
+/*
+ * Marvell Wireless LAN device driver: PCIE specific handling
+ *
+ * Copyright (C) 2011, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License"). You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+#include <linux/firmware.h>
+
+#include "decl.h"
+#include "ioctl.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "wmm.h"
+#include "11n.h"
+#include "pcie.h"
+
+#define PCIE_VERSION "1.0"
+#define DRV_NAME "Marvell mwifiex PCIe"
+
+static u8 user_rmmod;
+
+static struct mwifiex_if_ops pcie_ops;
+
+static struct semaphore add_remove_card_sem;
+static int mwifiex_pcie_enable_host_int(struct mwifiex_adapter *adapter);
+static int mwifiex_pcie_resume(struct pci_dev *pdev);
+
+/*
+ * This function is called after skb allocation to update
+ * "skb->cb" with physical address of data pointer.
+ */
+static phys_addr_t *mwifiex_update_sk_buff_pa(struct sk_buff *skb)
+{
+ phys_addr_t *buf_pa = MWIFIEX_SKB_PACB(skb);
+
+ *buf_pa = (phys_addr_t)virt_to_phys(skb->data);
+
+ return buf_pa;
+}
+
+/*
+ * This function reads sleep cookie and checks if FW is ready
+ */
+static bool mwifiex_pcie_ok_to_access_hw(struct mwifiex_adapter *adapter)
+{
+ u32 *cookie_addr;
+ struct pcie_service_card *card = adapter->card;
+
+ if (card->sleep_cookie) {
+ cookie_addr = (u32 *)card->sleep_cookie->data;
+ dev_dbg(adapter->dev, "info: ACCESS_HW: sleep cookie=0x%x\n",
+ *cookie_addr);
+ if (*cookie_addr == FW_AWAKE_COOKIE)
+ return true;
+ }
+
+ return false;
+}
+
+/*
+ * This function probes an mwifiex device and registers it. It allocates
+ * the card structure, enables PCIE function number and initiates the
+ * device registration and initialization procedure by adding a logical
+ * interface.
+ */
+static int mwifiex_pcie_probe(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct pcie_service_card *card;
+
+ pr_debug("info: vendor=0x%4.04X device=0x%4.04X rev=%d\n",
+ pdev->vendor, pdev->device, pdev->revision);
+
+ card = kzalloc(sizeof(struct pcie_service_card), GFP_KERNEL);
+ if (!card) {
+ pr_err("%s: failed to alloc memory\n", __func__);
+ return -ENOMEM;
+ }
+
+ card->dev = pdev;
+
+ if (mwifiex_add_card(card, &add_remove_card_sem, &pcie_ops,
+ MWIFIEX_PCIE)) {
+ pr_err("%s failed\n", __func__);
+ kfree(card);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * This function removes the interface and frees up the card structure.
+ */
+static void mwifiex_pcie_remove(struct pci_dev *pdev)
+{
+ struct pcie_service_card *card;
+ struct mwifiex_adapter *adapter;
+ int i;
+
+ card = pci_get_drvdata(pdev);
+ if (!card)
+ return;
+
+ adapter = card->adapter;
+ if (!adapter || !adapter->priv_num)
+ return;
+
+ if (user_rmmod) {
+#ifdef CONFIG_PM
+ if (adapter->is_suspended)
+ mwifiex_pcie_resume(pdev);
+#endif
+
+ for (i = 0; i < adapter->priv_num; i++)
+ if ((GET_BSS_ROLE(adapter->priv[i]) ==
+ MWIFIEX_BSS_ROLE_STA) &&
+ adapter->priv[i]->media_connected)
+ mwifiex_deauthenticate(adapter->priv[i], NULL);
+
+ mwifiex_disable_auto_ds(mwifiex_get_priv(adapter,
+ MWIFIEX_BSS_ROLE_ANY));
+
+ mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
+ MWIFIEX_BSS_ROLE_ANY),
+ MWIFIEX_FUNC_SHUTDOWN);
+ }
+
+ mwifiex_remove_card(card->adapter, &add_remove_card_sem);
+ kfree(card);
+}
+
+/*
+ * Kernel needs to suspend all functions separately. Therefore all
+ * registered functions must have drivers with suspend and resume
+ * methods. Failing that the kernel simply removes the whole card.
+ *
+ * If already not suspended, this function allocates and sends a host
+ * sleep activate request to the firmware and turns off the traffic.
+ */
+static int mwifiex_pcie_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct mwifiex_adapter *adapter;
+ struct pcie_service_card *card;
+ int hs_actived, i;
+
+ if (pdev) {
+ card = (struct pcie_service_card *) pci_get_drvdata(pdev);
+ if (!card || card->adapter) {
+ pr_err("Card or adapter structure is not valid\n");
+ return 0;
+ }
+ } else {
+ pr_err("PCIE device is not specified\n");
+ return 0;
+ }
+
+ adapter = card->adapter;
+
+ hs_actived = mwifiex_enable_hs(adapter);
+
+ /* Indicate device suspended */
+ adapter->is_suspended = true;
+
+ for (i = 0; i < adapter->priv_num; i++)
+ netif_carrier_off(adapter->priv[i]->netdev);
+
+ return 0;
+}
+
+/*
+ * Kernel needs to suspend all functions separately. Therefore all
+ * registered functions must have drivers with suspend and resume
+ * methods. Failing that the kernel simply removes the whole card.
+ *
+ * If already not resumed, this function turns on the traffic and
+ * sends a host sleep cancel request to the firmware.
+ */
+static int mwifiex_pcie_resume(struct pci_dev *pdev)
+{
+ struct mwifiex_adapter *adapter;
+ struct pcie_service_card *card;
+ int i;
+
+ if (pdev) {
+ card = (struct pcie_service_card *) pci_get_drvdata(pdev);
+ if (!card || !card->adapter) {
+ pr_err("Card or adapter structure is not valid\n");
+ return 0;
+ }
+ } else {
+ pr_err("PCIE device is not specified\n");
+ return 0;
+ }
+
+ adapter = card->adapter;
+
+ if (!adapter->is_suspended) {
+ dev_warn(adapter->dev, "Device already resumed\n");
+ return 0;
+ }
+
+ adapter->is_suspended = false;
+
+ for (i = 0; i < adapter->priv_num; i++)
+ if (adapter->priv[i]->media_connected)
+ netif_carrier_on(adapter->priv[i]->netdev);
+
+ mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
+ MWIFIEX_ASYNC_CMD);
+
+ return 0;
+}
+
+#define PCIE_VENDOR_ID_MARVELL (0x11ab)
+#define PCIE_DEVICE_ID_MARVELL_88W8766P (0x2b30)
+
+static DEFINE_PCI_DEVICE_TABLE(mwifiex_ids) = {
+ {
+ PCIE_VENDOR_ID_MARVELL, PCIE_DEVICE_ID_MARVELL_88W8766P,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(pci, mwifiex_ids);
+
+/* PCI Device Driver */
+static struct pci_driver __refdata mwifiex_pcie = {
+ .name = "mwifiex_pcie",
+ .id_table = mwifiex_ids,
+ .probe = mwifiex_pcie_probe,
+ .remove = mwifiex_pcie_remove,
+#ifdef CONFIG_PM
+ /* Power Management Hooks */
+ .suspend = mwifiex_pcie_suspend,
+ .resume = mwifiex_pcie_resume,
+#endif
+};
+
+/*
+ * This function writes data into PCIE card register.
+ */
+static int mwifiex_write_reg(struct mwifiex_adapter *adapter, int reg, u32 data)
+{
+ struct pcie_service_card *card = adapter->card;
+
+ iowrite32(data, card->pci_mmap1 + reg);
+
+ return 0;
+}
+
+/*
+ * This function reads data from PCIE card register.
+ */
+static int mwifiex_read_reg(struct mwifiex_adapter *adapter, int reg, u32 *data)
+{
+ struct pcie_service_card *card = adapter->card;
+
+ *data = ioread32(card->pci_mmap1 + reg);
+
+ return 0;
+}
+
+/*
+ * This function wakes up the card.
+ *
+ * A host power up command is written to the card configuration
+ * register to wake up the card.
+ */
+static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
+{
+ int i = 0;
+
+ while (mwifiex_pcie_ok_to_access_hw(adapter)) {
+ i++;
+ udelay(10);
+ /* 50ms max wait */
+ if (i == 50000)
+ break;
+ }
+
+ dev_dbg(adapter->dev, "event: Wakeup device...\n");
+
+ /* Enable interrupts or any chip access will wakeup device */
+ if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK, HOST_INTR_MASK)) {
+ dev_warn(adapter->dev, "Enable host interrupt failed\n");
+ return -1;
+ }
+
+ dev_dbg(adapter->dev, "PCIE wakeup: Setting PS_STATE_AWAKE\n");
+ adapter->ps_state = PS_STATE_AWAKE;
+
+ return 0;
+}
+
+/*
+ * This function is called after the card has woken up.
+ *
+ * The card configuration register is reset.
+ */
+static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
+{
+ dev_dbg(adapter->dev, "cmd: Wakeup device completed\n");
+
+ return 0;
+}
+
+/*
+ * This function disables the host interrupt.
+ *
+ * The host interrupt mask is read, the disable bit is reset and
+ * written back to the card host interrupt mask register.
+ */
+static int mwifiex_pcie_disable_host_int(struct mwifiex_adapter *adapter)
+{
+ if (mwifiex_pcie_ok_to_access_hw(adapter)) {
+ if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK,
+ 0x00000000)) {
+ dev_warn(adapter->dev, "Disable host interrupt failed\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * This function enables the host interrupt.
+ *
+ * The host interrupt enable mask is written to the card
+ * host interrupt mask register.
+ */
+static int mwifiex_pcie_enable_host_int(struct mwifiex_adapter *adapter)
+{
+ if (mwifiex_pcie_ok_to_access_hw(adapter)) {
+ /* Simply write the mask to the register */
+ if (mwifiex_write_reg(adapter, PCIE_HOST_INT_MASK,
+ HOST_INTR_MASK)) {
+ dev_warn(adapter->dev, "Enable host interrupt failed\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * This function creates buffer descriptor ring for TX
+ */
+static int mwifiex_pcie_create_txbd_ring(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ struct sk_buff *skb;
+ int i;
+ phys_addr_t *buf_pa;
+
+ /*
+ * driver maintaines the write pointer and firmware maintaines the read
+ * pointer. The write pointer starts at 0 (zero) while the read pointer
+ * starts at zero with rollover bit set
+ */
+ card->txbd_wrptr = 0;
+ card->txbd_rdptr |= MWIFIEX_BD_FLAG_ROLLOVER_IND;
+
+ /* allocate shared memory for the BD ring and divide the same in to
+ several descriptors */
+ card->txbd_ring_size = sizeof(struct mwifiex_pcie_buf_desc) *
+ MWIFIEX_MAX_TXRX_BD;
+ dev_dbg(adapter->dev, "info: txbd_ring: Allocating %d bytes\n",
+ card->txbd_ring_size);
+ card->txbd_ring_vbase = kzalloc(card->txbd_ring_size, GFP_KERNEL);
+ if (!card->txbd_ring_vbase) {
+ dev_err(adapter->dev, "Unable to allocate buffer for txbd ring.\n");
+ kfree(card->txbd_ring_vbase);
+ return -1;
+ }
+ card->txbd_ring_pbase = virt_to_phys(card->txbd_ring_vbase);
+
+ dev_dbg(adapter->dev, "info: txbd_ring - base: %p, pbase: %#x:%x,"
+ "len: %x\n", card->txbd_ring_vbase,
+ (u32)card->txbd_ring_pbase,
+ (u32)((u64)card->txbd_ring_pbase >> 32),
+ card->txbd_ring_size);
+
+ for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) {
+ card->txbd_ring[i] = (struct mwifiex_pcie_buf_desc *)
+ (card->txbd_ring_vbase +
+ (sizeof(struct mwifiex_pcie_buf_desc) * i));
+
+ /* Allocate buffer here so that firmware can DMA data from it */
+ skb = dev_alloc_skb(MWIFIEX_RX_DATA_BUF_SIZE);
+ if (!skb) {
+ dev_err(adapter->dev, "Unable to allocate skb for TX ring.\n");
+ kfree(card->txbd_ring_vbase);
+ return -ENOMEM;
+ }
+ buf_pa = mwifiex_update_sk_buff_pa(skb);
+
+ skb_put(skb, MWIFIEX_RX_DATA_BUF_SIZE);
+ dev_dbg(adapter->dev, "info: TX ring: add new skb base: %p, "
+ "buf_base: %p, buf_pbase: %#x:%x, "
+ "buf_len: %#x\n", skb, skb->data,
+ (u32)*buf_pa, (u32)(((u64)*buf_pa >> 32)),
+ skb->len);
+
+ card->tx_buf_list[i] = skb;
+ card->txbd_ring[i]->paddr = *buf_pa;
+ card->txbd_ring[i]->len = (u16)skb->len;
+ card->txbd_ring[i]->flags = 0;
+ }
+
+ return 0;
+}
+
+static int mwifiex_pcie_delete_txbd_ring(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ int i;
+
+ for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) {
+ if (card->tx_buf_list[i])
+ dev_kfree_skb_any(card->tx_buf_list[i]);
+ card->tx_buf_list[i] = NULL;
+ card->txbd_ring[i]->paddr = 0;
+ card->txbd_ring[i]->len = 0;
+ card->txbd_ring[i]->flags = 0;
+ card->txbd_ring[i] = NULL;
+ }
+
+ kfree(card->txbd_ring_vbase);
+ card->txbd_ring_size = 0;
+ card->txbd_wrptr = 0;
+ card->txbd_rdptr = 0 | MWIFIEX_BD_FLAG_ROLLOVER_IND;
+ card->txbd_ring_vbase = NULL;
+
+ return 0;
+}
+
+/*
+ * This function creates buffer descriptor ring for RX
+ */
+static int mwifiex_pcie_create_rxbd_ring(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ struct sk_buff *skb;
+ int i;
+ phys_addr_t *buf_pa;
+
+ /*
+ * driver maintaines the read pointer and firmware maintaines the write
+ * pointer. The write pointer starts at 0 (zero) while the read pointer
+ * starts at zero with rollover bit set
+ */
+ card->rxbd_wrptr = 0;
+ card->rxbd_rdptr |= MWIFIEX_BD_FLAG_ROLLOVER_IND;
+
+ card->rxbd_ring_size = sizeof(struct mwifiex_pcie_buf_desc) *
+ MWIFIEX_MAX_TXRX_BD;
+ dev_dbg(adapter->dev, "info: rxbd_ring: Allocating %d bytes\n",
+ card->rxbd_ring_size);
+ card->rxbd_ring_vbase = kzalloc(card->rxbd_ring_size, GFP_KERNEL);
+ if (!card->rxbd_ring_vbase) {
+ dev_err(adapter->dev, "Unable to allocate buffer for "
+ "rxbd_ring.\n");
+ return -1;
+ }
+ card->rxbd_ring_pbase = virt_to_phys(card->rxbd_ring_vbase);
+
+ dev_dbg(adapter->dev, "info: rxbd_ring - base: %p, pbase: %#x:%x,"
+ "len: %#x\n", card->rxbd_ring_vbase,
+ (u32)card->rxbd_ring_pbase,
+ (u32)((u64)card->rxbd_ring_pbase >> 32),
+ card->rxbd_ring_size);
+
+ for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) {
+ card->rxbd_ring[i] = (struct mwifiex_pcie_buf_desc *)
+ (card->rxbd_ring_vbase +
+ (sizeof(struct mwifiex_pcie_buf_desc) * i));
+
+ /* Allocate skb here so that firmware can DMA data from it */
+ skb = dev_alloc_skb(MWIFIEX_RX_DATA_BUF_SIZE);
+ if (!skb) {
+ dev_err(adapter->dev, "Unable to allocate skb for RX ring.\n");
+ kfree(card->rxbd_ring_vbase);
+ return -ENOMEM;
+ }
+ buf_pa = mwifiex_update_sk_buff_pa(skb);
+ skb_put(skb, MWIFIEX_RX_DATA_BUF_SIZE);
+
+ dev_dbg(adapter->dev, "info: RX ring: add new skb base: %p, "
+ "buf_base: %p, buf_pbase: %#x:%x, "
+ "buf_len: %#x\n", skb, skb->data,
+ (u32)*buf_pa, (u32)((u64)*buf_pa >> 32),
+ skb->len);
+
+ card->rx_buf_list[i] = skb;
+ card->rxbd_ring[i]->paddr = *buf_pa;
+ card->rxbd_ring[i]->len = (u16)skb->len;
+ card->rxbd_ring[i]->flags = 0;
+ }
+
+ return 0;
+}
+
+/*
+ * This function deletes Buffer descriptor ring for RX
+ */
+static int mwifiex_pcie_delete_rxbd_ring(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ int i;
+
+ for (i = 0; i < MWIFIEX_MAX_TXRX_BD; i++) {
+ if (card->rx_buf_list[i])
+ dev_kfree_skb_any(card->rx_buf_list[i]);
+ card->rx_buf_list[i] = NULL;
+ card->rxbd_ring[i]->paddr = 0;
+ card->rxbd_ring[i]->len = 0;
+ card->rxbd_ring[i]->flags = 0;
+ card->rxbd_ring[i] = NULL;
+ }
+
+ kfree(card->rxbd_ring_vbase);
+ card->rxbd_ring_size = 0;
+ card->rxbd_wrptr = 0;
+ card->rxbd_rdptr = 0 | MWIFIEX_BD_FLAG_ROLLOVER_IND;
+ card->rxbd_ring_vbase = NULL;
+
+ return 0;
+}
+
+/*
+ * This function creates buffer descriptor ring for Events
+ */
+static int mwifiex_pcie_create_evtbd_ring(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ struct sk_buff *skb;
+ int i;
+ phys_addr_t *buf_pa;
+
+ /*
+ * driver maintaines the read pointer and firmware maintaines the write
+ * pointer. The write pointer starts at 0 (zero) while the read pointer
+ * starts at zero with rollover bit set
+ */
+ card->evtbd_wrptr = 0;
+ card->evtbd_rdptr |= MWIFIEX_BD_FLAG_ROLLOVER_IND;
+
+ card->evtbd_ring_size = sizeof(struct mwifiex_pcie_buf_desc) *
+ MWIFIEX_MAX_EVT_BD;
+ dev_dbg(adapter->dev, "info: evtbd_ring: Allocating %d bytes\n",
+ card->evtbd_ring_size);
+ card->evtbd_ring_vbase = kzalloc(card->evtbd_ring_size, GFP_KERNEL);
+ if (!card->evtbd_ring_vbase) {
+ dev_err(adapter->dev, "Unable to allocate buffer. "
+ "Terminating download\n");
+ return -1;
+ }
+ card->evtbd_ring_pbase = virt_to_phys(card->evtbd_ring_vbase);
+
+ dev_dbg(adapter->dev, "info: CMDRSP/EVT bd_ring - base: %p, "
+ "pbase: %#x:%x, len: %#x\n", card->evtbd_ring_vbase,
+ (u32)card->evtbd_ring_pbase,
+ (u32)((u64)card->evtbd_ring_pbase >> 32),
+ card->evtbd_ring_size);
+
+ for (i = 0; i < MWIFIEX_MAX_EVT_BD; i++) {
+ card->evtbd_ring[i] = (struct mwifiex_pcie_buf_desc *)
+ (card->evtbd_ring_vbase +
+ (sizeof(struct mwifiex_pcie_buf_desc) * i));
+
+ /* Allocate skb here so that firmware can DMA data from it */
+ skb = dev_alloc_skb(MAX_EVENT_SIZE);
+ if (!skb) {
+ dev_err(adapter->dev, "Unable to allocate skb for EVENT buf.\n");
+ kfree(card->evtbd_ring_vbase);
+ return -ENOMEM;
+ }
+ buf_pa = mwifiex_update_sk_buff_pa(skb);
+ skb_put(skb, MAX_EVENT_SIZE);
+
+ dev_dbg(adapter->dev, "info: Evt ring: add new skb. base: %p, "
+ "buf_base: %p, buf_pbase: %#x:%x, "
+ "buf_len: %#x\n", skb, skb->data,
+ (u32)*buf_pa, (u32)((u64)*buf_pa >> 32),
+ skb->len);
+
+ card->evt_buf_list[i] = skb;
+ card->evtbd_ring[i]->paddr = *buf_pa;
+ card->evtbd_ring[i]->len = (u16)skb->len;
+ card->evtbd_ring[i]->flags = 0;
+ }
+
+ return 0;
+}
+
+/*
+ * This function deletes Buffer descriptor ring for Events
+ */
+static int mwifiex_pcie_delete_evtbd_ring(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ int i;
+
+ for (i = 0; i < MWIFIEX_MAX_EVT_BD; i++) {
+ if (card->evt_buf_list[i])
+ dev_kfree_skb_any(card->evt_buf_list[i]);
+ card->evt_buf_list[i] = NULL;
+ card->evtbd_ring[i]->paddr = 0;
+ card->evtbd_ring[i]->len = 0;
+ card->evtbd_ring[i]->flags = 0;
+ card->evtbd_ring[i] = NULL;
+ }
+
+ kfree(card->evtbd_ring_vbase);
+ card->evtbd_wrptr = 0;
+ card->evtbd_rdptr = 0 | MWIFIEX_BD_FLAG_ROLLOVER_IND;
+ card->evtbd_ring_size = 0;
+ card->evtbd_ring_vbase = NULL;
+
+ return 0;
+}
+
+/*
+ * This function allocates a buffer for CMDRSP
+ */
+static int mwifiex_pcie_alloc_cmdrsp_buf(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ struct sk_buff *skb;
+
+ /* Allocate memory for receiving command response data */
+ skb = dev_alloc_skb(MWIFIEX_UPLD_SIZE);
+ if (!skb) {
+ dev_err(adapter->dev, "Unable to allocate skb for command "
+ "response data.\n");
+ return -ENOMEM;
+ }
+ mwifiex_update_sk_buff_pa(skb);
+ skb_put(skb, MWIFIEX_UPLD_SIZE);
+ card->cmdrsp_buf = skb;
+
+ skb = NULL;
+ /* Allocate memory for sending command to firmware */
+ skb = dev_alloc_skb(MWIFIEX_SIZE_OF_CMD_BUFFER);
+ if (!skb) {
+ dev_err(adapter->dev, "Unable to allocate skb for command "
+ "data.\n");
+ return -ENOMEM;
+ }
+ mwifiex_update_sk_buff_pa(skb);
+ skb_put(skb, MWIFIEX_SIZE_OF_CMD_BUFFER);
+ card->cmd_buf = skb;
+
+ return 0;
+}
+
+/*
+ * This function deletes a buffer for CMDRSP
+ */
+static int mwifiex_pcie_delete_cmdrsp_buf(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card;
+
+ if (!adapter)
+ return 0;
+
+ card = adapter->card;
+
+ if (card && card->cmdrsp_buf)
+ dev_kfree_skb_any(card->cmdrsp_buf);
+
+ if (card && card->cmd_buf)
+ dev_kfree_skb_any(card->cmd_buf);
+
+ return 0;
+}
+
+/*
+ * This function allocates a buffer for sleep cookie
+ */
+static int mwifiex_pcie_alloc_sleep_cookie_buf(struct mwifiex_adapter *adapter)
+{
+ struct sk_buff *skb;
+ struct pcie_service_card *card = adapter->card;
+
+ /* Allocate memory for sleep cookie */
+ skb = dev_alloc_skb(sizeof(u32));
+ if (!skb) {
+ dev_err(adapter->dev, "Unable to allocate skb for sleep "
+ "cookie!\n");
+ return -ENOMEM;
+ }
+ mwifiex_update_sk_buff_pa(skb);
+ skb_put(skb, sizeof(u32));
+
+ /* Init val of Sleep Cookie */
+ *(u32 *)skb->data = FW_AWAKE_COOKIE;
+
+ dev_dbg(adapter->dev, "alloc_scook: sleep cookie=0x%x\n",
+ *((u32 *)skb->data));
+
+ /* Save the sleep cookie */
+ card->sleep_cookie = skb;
+
+ return 0;
+}
+
+/*
+ * This function deletes buffer for sleep cookie
+ */
+static int mwifiex_pcie_delete_sleep_cookie_buf(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card;
+
+ if (!adapter)
+ return 0;
+
+ card = adapter->card;
+
+ if (card && card->sleep_cookie) {
+ dev_kfree_skb_any(card->sleep_cookie);
+ card->sleep_cookie = NULL;
+ }
+
+ return 0;
+}
+
+/*
+ * This function sends data buffer to device
+ */
+static int
+mwifiex_pcie_send_data(struct mwifiex_adapter *adapter, struct sk_buff *skb)
+{
+ struct pcie_service_card *card = adapter->card;
+ u32 wrindx, rdptr;
+ phys_addr_t *buf_pa;
+ __le16 *tmp;
+
+ if (!mwifiex_pcie_ok_to_access_hw(adapter))
+ mwifiex_pm_wakeup_card(adapter);
+
+ /* Read the TX ring read pointer set by firmware */
+ if (mwifiex_read_reg(adapter, REG_TXBD_RDPTR, &rdptr)) {
+ dev_err(adapter->dev, "SEND DATA: failed to read "
+ "REG_TXBD_RDPTR\n");
+ return -1;
+ }
+
+ wrindx = card->txbd_wrptr & MWIFIEX_TXBD_MASK;
+
+ dev_dbg(adapter->dev, "info: SEND DATA: <Rd: %#x, Wr: %#x>\n", rdptr,
+ card->txbd_wrptr);
+ if (((card->txbd_wrptr & MWIFIEX_TXBD_MASK) !=
+ (rdptr & MWIFIEX_TXBD_MASK)) ||
+ ((card->txbd_wrptr & MWIFIEX_BD_FLAG_ROLLOVER_IND) !=
+ (rdptr & MWIFIEX_BD_FLAG_ROLLOVER_IND))) {
+ struct sk_buff *skb_data;
+ u8 *payload;
+
+ adapter->data_sent = true;
+ skb_data = card->tx_buf_list[wrindx];
+ memcpy(skb_data->data, skb->data, skb->len);
+ payload = skb_data->data;
+ tmp = (__le16 *)&payload[0];
+ *tmp = cpu_to_le16((u16)skb->len);
+ tmp = (__le16 *)&payload[2];
+ *tmp = cpu_to_le16(MWIFIEX_TYPE_DATA);
+ skb_put(skb_data, MWIFIEX_RX_DATA_BUF_SIZE - skb_data->len);
+ skb_trim(skb_data, skb->len);
+ buf_pa = MWIFIEX_SKB_PACB(skb_data);
+ card->txbd_ring[wrindx]->paddr = *buf_pa;
+ card->txbd_ring[wrindx]->len = (u16)skb_data->len;
+ card->txbd_ring[wrindx]->flags = MWIFIEX_BD_FLAG_FIRST_DESC |
+ MWIFIEX_BD_FLAG_LAST_DESC;
+
+ if ((++card->txbd_wrptr & MWIFIEX_TXBD_MASK) ==
+ MWIFIEX_MAX_TXRX_BD)
+ card->txbd_wrptr = ((card->txbd_wrptr &
+ MWIFIEX_BD_FLAG_ROLLOVER_IND) ^
+ MWIFIEX_BD_FLAG_ROLLOVER_IND);
+
+ /* Write the TX ring write pointer in to REG_TXBD_WRPTR */
+ if (mwifiex_write_reg(adapter, REG_TXBD_WRPTR,
+ card->txbd_wrptr)) {
+ dev_err(adapter->dev, "SEND DATA: failed to write "
+ "REG_TXBD_WRPTR\n");
+ return 0;
+ }
+
+ /* Send the TX ready interrupt */
+ if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
+ CPU_INTR_DNLD_RDY)) {
+ dev_err(adapter->dev, "SEND DATA: failed to assert "
+ "door-bell interrupt.\n");
+ return -1;
+ }
+ dev_dbg(adapter->dev, "info: SEND DATA: Updated <Rd: %#x, Wr: "
+ "%#x> and sent packet to firmware "
+ "successfully\n", rdptr,
+ card->txbd_wrptr);
+ } else {
+ dev_dbg(adapter->dev, "info: TX Ring full, can't send anymore "
+ "packets to firmware\n");
+ adapter->data_sent = true;
+ /* Send the TX ready interrupt */
+ if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
+ CPU_INTR_DNLD_RDY))
+ dev_err(adapter->dev, "SEND DATA: failed to assert "
+ "door-bell interrupt\n");
+ return -EBUSY;
+ }
+
+ return 0;
+}
+
+/*
+ * This function handles received buffer ring and
+ * dispatches packets to upper
+ */
+static int mwifiex_pcie_process_recv_data(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ u32 wrptr, rd_index;
+ int ret = 0;
+ struct sk_buff *skb_tmp = NULL;
+
+ /* Read the RX ring Write pointer set by firmware */
+ if (mwifiex_read_reg(adapter, REG_RXBD_WRPTR, &wrptr)) {
+ dev_err(adapter->dev, "RECV DATA: failed to read "
+ "REG_TXBD_RDPTR\n");
+ ret = -1;
+ goto done;
+ }
+
+ while (((wrptr & MWIFIEX_RXBD_MASK) !=
+ (card->rxbd_rdptr & MWIFIEX_RXBD_MASK)) ||
+ ((wrptr & MWIFIEX_BD_FLAG_ROLLOVER_IND) ==
+ (card->rxbd_rdptr & MWIFIEX_BD_FLAG_ROLLOVER_IND))) {
+ struct sk_buff *skb_data;
+ u16 rx_len;
+
+ rd_index = card->rxbd_rdptr & MWIFIEX_RXBD_MASK;
+ skb_data = card->rx_buf_list[rd_index];
+
+ /* Get data length from interface header -
+ first byte is len, second byte is type */
+ rx_len = *((u16 *)skb_data->data);
+ dev_dbg(adapter->dev, "info: RECV DATA: Rd=%#x, Wr=%#x, "
+ "Len=%d\n", card->rxbd_rdptr, wrptr, rx_len);
+ skb_tmp = dev_alloc_skb(rx_len);
+ if (!skb_tmp) {
+ dev_dbg(adapter->dev, "info: Failed to alloc skb "
+ "for RX\n");
+ ret = -EBUSY;
+ goto done;
+ }
+
+ skb_put(skb_tmp, rx_len);
+
+ memcpy(skb_tmp->data, skb_data->data + INTF_HEADER_LEN, rx_len);
+ if ((++card->rxbd_rdptr & MWIFIEX_RXBD_MASK) ==
+ MWIFIEX_MAX_TXRX_BD) {
+ card->rxbd_rdptr = ((card->rxbd_rdptr &
+ MWIFIEX_BD_FLAG_ROLLOVER_IND) ^
+ MWIFIEX_BD_FLAG_ROLLOVER_IND);
+ }
+ dev_dbg(adapter->dev, "info: RECV DATA: <Rd: %#x, Wr: %#x>\n",
+ card->rxbd_rdptr, wrptr);
+
+ /* Write the RX ring read pointer in to REG_RXBD_RDPTR */
+ if (mwifiex_write_reg(adapter, REG_RXBD_RDPTR,
+ card->rxbd_rdptr)) {
+ dev_err(adapter->dev, "RECV DATA: failed to "
+ "write REG_RXBD_RDPTR\n");
+ ret = -1;
+ goto done;
+ }
+
+ /* Read the RX ring Write pointer set by firmware */
+ if (mwifiex_read_reg(adapter, REG_RXBD_WRPTR, &wrptr)) {
+ dev_err(adapter->dev, "RECV DATA: failed to read "
+ "REG_TXBD_RDPTR\n");
+ ret = -1;
+ goto done;
+ }
+ dev_dbg(adapter->dev, "info: RECV DATA: Received packet from "
+ "firmware successfully\n");
+ mwifiex_handle_rx_packet(adapter, skb_tmp);
+ }
+
+done:
+ if (ret && skb_tmp)
+ dev_kfree_skb_any(skb_tmp);
+ return ret;
+}
+
+/*
+ * This function downloads the boot command to device
+ */
+static int
+mwifiex_pcie_send_boot_cmd(struct mwifiex_adapter *adapter, struct sk_buff *skb)
+{
+ phys_addr_t *buf_pa = MWIFIEX_SKB_PACB(skb);
+
+ if (!(skb->data && skb->len && *buf_pa)) {
+ dev_err(adapter->dev, "Invalid parameter in %s <%p, %#x:%x, "
+ "%x>\n", __func__, skb->data, skb->len,
+ (u32)*buf_pa, (u32)((u64)*buf_pa >> 32));
+ return -1;
+ }
+
+ /* Write the lower 32bits of the physical address to scratch
+ * register 0 */
+ if (mwifiex_write_reg(adapter, PCIE_SCRATCH_0_REG, (u32)*buf_pa)) {
+ dev_err(adapter->dev, "%s: failed to write download command "
+ "to boot code.\n", __func__);
+ return -1;
+ }
+
+ /* Write the upper 32bits of the physical address to scratch
+ * register 1 */
+ if (mwifiex_write_reg(adapter, PCIE_SCRATCH_1_REG,
+ (u32)((u64)*buf_pa >> 32))) {
+ dev_err(adapter->dev, "%s: failed to write download command "
+ "to boot code.\n", __func__);
+ return -1;
+ }
+
+ /* Write the command length to scratch register 2 */
+ if (mwifiex_write_reg(adapter, PCIE_SCRATCH_2_REG, skb->len)) {
+ dev_err(adapter->dev, "%s: failed to write command length to "
+ "scratch register 2\n", __func__);
+ return -1;
+ }
+
+ /* Ring the door bell */
+ if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
+ CPU_INTR_DOOR_BELL)) {
+ dev_err(adapter->dev, "%s: failed to assert door-bell "
+ "interrupt.\n", __func__);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * This function downloads commands to the device
+ */
+static int
+mwifiex_pcie_send_cmd(struct mwifiex_adapter *adapter, struct sk_buff *skb)
+{
+ struct pcie_service_card *card = adapter->card;
+ int ret = 0;
+ phys_addr_t *cmd_buf_pa;
+ phys_addr_t *cmdrsp_buf_pa;
+
+ if (!(skb->data && skb->len)) {
+ dev_err(adapter->dev, "Invalid parameter in %s <%p, %#x>\n",
+ __func__, skb->data, skb->len);
+ return -1;
+ }
+
+ /* Make sure a command response buffer is available */
+ if (!card->cmdrsp_buf) {
+ dev_err(adapter->dev, "No response buffer available, send "
+ "command failed\n");
+ return -EBUSY;
+ }
+
+ /* Make sure a command buffer is available */
+ if (!card->cmd_buf) {
+ dev_err(adapter->dev, "Command buffer not available\n");
+ return -EBUSY;
+ }
+
+ adapter->cmd_sent = true;
+ /* Copy the given skb in to DMA accessable shared buffer */
+ skb_put(card->cmd_buf, MWIFIEX_SIZE_OF_CMD_BUFFER - card->cmd_buf->len);
+ skb_trim(card->cmd_buf, skb->len);
+ memcpy(card->cmd_buf->data, skb->data, skb->len);
+
+ /* To send a command, the driver will:
+ 1. Write the 64bit physical address of the data buffer to
+ SCRATCH1 + SCRATCH0
+ 2. Ring the door bell (i.e. set the door bell interrupt)
+
+ In response to door bell interrupt, the firmware will perform
+ the DMA of the command packet (first header to obtain the total
+ length and then rest of the command).
+ */
+
+ if (card->cmdrsp_buf) {
+ cmdrsp_buf_pa = MWIFIEX_SKB_PACB(card->cmdrsp_buf);
+ /* Write the lower 32bits of the cmdrsp buffer physical
+ address */
+ if (mwifiex_write_reg(adapter, REG_CMDRSP_ADDR_LO,
+ (u32)*cmdrsp_buf_pa)) {
+ dev_err(adapter->dev, "Failed to write download command to boot code.\n");
+ ret = -1;
+ goto done;
+ }
+ /* Write the upper 32bits of the cmdrsp buffer physical
+ address */
+ if (mwifiex_write_reg(adapter, REG_CMDRSP_ADDR_HI,
+ (u32)((u64)*cmdrsp_buf_pa >> 32))) {
+ dev_err(adapter->dev, "Failed to write download command"
+ " to boot code.\n");
+ ret = -1;
+ goto done;
+ }
+ }
+
+ cmd_buf_pa = MWIFIEX_SKB_PACB(card->cmd_buf);
+ /* Write the lower 32bits of the physical address to REG_CMD_ADDR_LO */
+ if (mwifiex_write_reg(adapter, REG_CMD_ADDR_LO,
+ (u32)*cmd_buf_pa)) {
+ dev_err(adapter->dev, "Failed to write download command "
+ "to boot code.\n");
+ ret = -1;
+ goto done;
+ }
+ /* Write the upper 32bits of the physical address to REG_CMD_ADDR_HI */
+ if (mwifiex_write_reg(adapter, REG_CMD_ADDR_HI,
+ (u32)((u64)*cmd_buf_pa >> 32))) {
+ dev_err(adapter->dev, "Failed to write download command "
+ "to boot code.\n");
+ ret = -1;
+ goto done;
+ }
+
+ /* Write the command length to REG_CMD_SIZE */
+ if (mwifiex_write_reg(adapter, REG_CMD_SIZE,
+ card->cmd_buf->len)) {
+ dev_err(adapter->dev, "Failed to write command length to "
+ "REG_CMD_SIZE\n");
+ ret = -1;
+ goto done;
+ }
+
+ /* Ring the door bell */
+ if (mwifiex_write_reg(adapter, PCIE_CPU_INT_EVENT,
+ CPU_INTR_DOOR_BELL)) {
+ dev_err(adapter->dev, "Failed to assert door-bell "
+ "interrupt.\n");
+ ret = -1;
+ goto done;
+ }
+
+done:
+ if (ret)
+ adapter->cmd_sent = false;
+
+ return 0;
+}
+
+/*
+ * This function handles command complete interrupt
+ */
+static int mwifiex_pcie_process_cmd_complete(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ int count = 0;
+
+ dev_dbg(adapter->dev, "info: Rx CMD Response\n");
+
+ if (!adapter->curr_cmd) {
+ skb_pull(card->cmdrsp_buf, INTF_HEADER_LEN);
+ if (adapter->ps_state == PS_STATE_SLEEP_CFM) {
+ mwifiex_process_sleep_confirm_resp(adapter,
+ card->cmdrsp_buf->data,
+ card->cmdrsp_buf->len);
+ while (mwifiex_pcie_ok_to_access_hw(adapter) &&
+ (count++ < 10))
+ udelay(50);
+ } else {
+ dev_err(adapter->dev, "There is no command but "
+ "got cmdrsp\n");
+ }
+ memcpy(adapter->upld_buf, card->cmdrsp_buf->data,
+ min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
+ card->cmdrsp_buf->len));
+ skb_push(card->cmdrsp_buf, INTF_HEADER_LEN);
+ } else if (mwifiex_pcie_ok_to_access_hw(adapter)) {
+ skb_pull(card->cmdrsp_buf, INTF_HEADER_LEN);
+ adapter->curr_cmd->resp_skb = card->cmdrsp_buf;
+ adapter->cmd_resp_received = true;
+ /* Take the pointer and set it to CMD node and will
+ return in the response complete callback */
+ card->cmdrsp_buf = NULL;
+
+ /* Clear the cmd-rsp buffer address in scratch registers. This
+ will prevent firmware from writing to the same response
+ buffer again. */
+ if (mwifiex_write_reg(adapter, REG_CMDRSP_ADDR_LO, 0)) {
+ dev_err(adapter->dev, "cmd_done: failed to clear "
+ "cmd_rsp address.\n");
+ return -1;
+ }
+ /* Write the upper 32bits of the cmdrsp buffer physical
+ address */
+ if (mwifiex_write_reg(adapter, REG_CMDRSP_ADDR_HI, 0)) {
+ dev_err(adapter->dev, "cmd_done: failed to clear "
+ "cmd_rsp address.\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Command Response processing complete handler
+ */
+static int mwifiex_pcie_cmdrsp_complete(struct mwifiex_adapter *adapter,
+ struct sk_buff *skb)
+{
+ struct pcie_service_card *card = adapter->card;
+
+ if (skb) {
+ card->cmdrsp_buf = skb;
+ skb_push(card->cmdrsp_buf, INTF_HEADER_LEN);
+ }
+
+ return 0;
+}
+
+/*
+ * This function handles firmware event ready interrupt
+ */
+static int mwifiex_pcie_process_event_ready(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ u32 rdptr = card->evtbd_rdptr & MWIFIEX_EVTBD_MASK;
+ u32 wrptr, event;
+
+ if (adapter->event_received) {
+ dev_dbg(adapter->dev, "info: Event being processed, "\
+ "do not process this interrupt just yet\n");
+ return 0;
+ }
+
+ if (rdptr >= MWIFIEX_MAX_EVT_BD) {
+ dev_dbg(adapter->dev, "info: Invalid read pointer...\n");
+ return -1;
+ }
+
+ /* Read the event ring write pointer set by firmware */
+ if (mwifiex_read_reg(adapter, REG_EVTBD_WRPTR, &wrptr)) {
+ dev_err(adapter->dev, "EventReady: failed to read REG_EVTBD_WRPTR\n");
+ return -1;
+ }
+
+ dev_dbg(adapter->dev, "info: EventReady: Initial <Rd: 0x%x, Wr: 0x%x>",
+ card->evtbd_rdptr, wrptr);
+ if (((wrptr & MWIFIEX_EVTBD_MASK) !=
+ (card->evtbd_rdptr & MWIFIEX_EVTBD_MASK)) ||
+ ((wrptr & MWIFIEX_BD_FLAG_ROLLOVER_IND) ==
+ (card->evtbd_rdptr & MWIFIEX_BD_FLAG_ROLLOVER_IND))) {
+ struct sk_buff *skb_cmd;
+ __le16 data_len = 0;
+ u16 evt_len;
+
+ dev_dbg(adapter->dev, "info: Read Index: %d\n", rdptr);
+ skb_cmd = card->evt_buf_list[rdptr];
+ /* Take the pointer and set it to event pointer in adapter
+ and will return back after event handling callback */
+ card->evt_buf_list[rdptr] = NULL;
+ card->evtbd_ring[rdptr]->paddr = 0;
+ card->evtbd_ring[rdptr]->len = 0;
+ card->evtbd_ring[rdptr]->flags = 0;
+
+ event = *(u32 *) &skb_cmd->data[INTF_HEADER_LEN];
+ adapter->event_cause = event;
+ /* The first 4bytes will be the event transfer header
+ len is 2 bytes followed by type which is 2 bytes */
+ memcpy(&data_len, skb_cmd->data, sizeof(__le16));
+ evt_len = le16_to_cpu(data_len);
+
+ skb_pull(skb_cmd, INTF_HEADER_LEN);
+ dev_dbg(adapter->dev, "info: Event length: %d\n", evt_len);
+
+ if ((evt_len > 0) && (evt_len < MAX_EVENT_SIZE))
+ memcpy(adapter->event_body, skb_cmd->data +
+ MWIFIEX_EVENT_HEADER_LEN, evt_len -
+ MWIFIEX_EVENT_HEADER_LEN);
+
+ adapter->event_received = true;
+ adapter->event_skb = skb_cmd;
+
+ /* Do not update the event read pointer here, wait till the
+ buffer is released. This is just to make things simpler,
+ we need to find a better method of managing these buffers.
+ */
+ }
+
+ return 0;
+}
+
+/*
+ * Event processing complete handler
+ */
+static int mwifiex_pcie_event_complete(struct mwifiex_adapter *adapter,
+ struct sk_buff *skb)
+{
+ struct pcie_service_card *card = adapter->card;
+ int ret = 0;
+ u32 rdptr = card->evtbd_rdptr & MWIFIEX_EVTBD_MASK;
+ u32 wrptr;
+ phys_addr_t *buf_pa;
+
+ if (!skb)
+ return 0;
+
+ if (rdptr >= MWIFIEX_MAX_EVT_BD)
+ dev_err(adapter->dev, "event_complete: Invalid rdptr 0x%x\n",
+ rdptr);
+
+ /* Read the event ring write pointer set by firmware */
+ if (mwifiex_read_reg(adapter, REG_EVTBD_WRPTR, &wrptr)) {
+ dev_err(adapter->dev, "event_complete: failed to read REG_EVTBD_WRPTR\n");
+ ret = -1;
+ goto done;
+ }
+
+ if (!card->evt_buf_list[rdptr]) {
+ skb_push(skb, INTF_HEADER_LEN);
+ card->evt_buf_list[rdptr] = skb;
+ buf_pa = MWIFIEX_SKB_PACB(skb);
+ card->evtbd_ring[rdptr]->paddr = *buf_pa;
+ card->evtbd_ring[rdptr]->len = (u16)skb->len;
+ card->evtbd_ring[rdptr]->flags = 0;
+ skb = NULL;
+ } else {
+ dev_dbg(adapter->dev, "info: ERROR: Buffer is still valid at "
+ "index %d, <%p, %p>\n", rdptr,
+ card->evt_buf_list[rdptr], skb);
+ }
+
+ if ((++card->evtbd_rdptr & MWIFIEX_EVTBD_MASK) == MWIFIEX_MAX_EVT_BD) {
+ card->evtbd_rdptr = ((card->evtbd_rdptr &
+ MWIFIEX_BD_FLAG_ROLLOVER_IND) ^
+ MWIFIEX_BD_FLAG_ROLLOVER_IND);
+ }
+
+ dev_dbg(adapter->dev, "info: Updated <Rd: 0x%x, Wr: 0x%x>",
+ card->evtbd_rdptr, wrptr);
+
+ /* Write the event ring read pointer in to REG_EVTBD_RDPTR */
+ if (mwifiex_write_reg(adapter, REG_EVTBD_RDPTR, card->evtbd_rdptr)) {
+ dev_err(adapter->dev, "event_complete: failed to read REG_EVTBD_RDPTR\n");
+ ret = -1;
+ goto done;
+ }
+
+done:
+ /* Free the buffer for failure case */
+ if (ret && skb)
+ dev_kfree_skb_any(skb);
+
+ dev_dbg(adapter->dev, "info: Check Events Again\n");
+ ret = mwifiex_pcie_process_event_ready(adapter);
+
+ return ret;
+}
+
+/*
+ * This function downloads the firmware to the card.
+ *
+ * Firmware is downloaded to the card in blocks. Every block download
+ * is tested for CRC errors, and retried a number of times before
+ * returning failure.
+ */
+static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
+ struct mwifiex_fw_image *fw)
+{
+ int ret;
+ u8 *firmware = fw->fw_buf;
+ u32 firmware_len = fw->fw_len;
+ u32 offset = 0;
+ struct sk_buff *skb;
+ u32 txlen, tx_blocks = 0, tries, len;
+ u32 block_retry_cnt = 0;
+
+ if (!adapter) {
+ pr_err("adapter structure is not valid\n");
+ return -1;
+ }
+
+ if (!firmware || !firmware_len) {
+ dev_err(adapter->dev, "No firmware image found! "
+ "Terminating download\n");
+ return -1;
+ }
+
+ dev_dbg(adapter->dev, "info: Downloading FW image (%d bytes)\n",
+ firmware_len);
+
+ if (mwifiex_pcie_disable_host_int(adapter)) {
+ dev_err(adapter->dev, "%s: Disabling interrupts"
+ " failed.\n", __func__);
+ return -1;
+ }
+
+ skb = dev_alloc_skb(MWIFIEX_UPLD_SIZE);
+ if (!skb) {
+ ret = -ENOMEM;
+ goto done;
+ }
+ mwifiex_update_sk_buff_pa(skb);
+
+ /* Perform firmware data transfer */
+ do {
+ u32 ireg_intr = 0;
+
+ /* More data? */
+ if (offset >= firmware_len)
+ break;
+
+ for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
+ ret = mwifiex_read_reg(adapter, PCIE_SCRATCH_2_REG,
+ &len);
+ if (ret) {
+ dev_warn(adapter->dev, "Failed reading length from boot code\n");
+ goto done;
+ }
+ if (len)
+ break;
+ udelay(10);
+ }
+
+ if (!len) {
+ break;
+ } else if (len > MWIFIEX_UPLD_SIZE) {
+ pr_err("FW download failure @ %d, invalid length %d\n",
+ offset, len);
+ ret = -1;
+ goto done;
+ }
+
+ txlen = len;
+
+ if (len & BIT(0)) {
+ block_retry_cnt++;
+ if (block_retry_cnt > MAX_WRITE_IOMEM_RETRY) {
+ pr_err("FW download failure @ %d, over max "
+ "retry count\n", offset);
+ ret = -1;
+ goto done;
+ }
+ dev_err(adapter->dev, "FW CRC error indicated by the "
+ "helper: len = 0x%04X, txlen = "
+ "%d\n", len, txlen);
+ len &= ~BIT(0);
+ /* Setting this to 0 to resend from same offset */
+ txlen = 0;
+ } else {
+ block_retry_cnt = 0;
+ /* Set blocksize to transfer - checking for
+ last block */
+ if (firmware_len - offset < txlen)
+ txlen = firmware_len - offset;
+
+ dev_dbg(adapter->dev, ".");
+
+ tx_blocks =
+ (txlen + MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD - 1) /
+ MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD;
+
+ /* Copy payload to buffer */
+ memmove(skb->data, &firmware[offset], txlen);
+ }
+
+ skb_put(skb, MWIFIEX_UPLD_SIZE - skb->len);
+ skb_trim(skb, tx_blocks * MWIFIEX_PCIE_BLOCK_SIZE_FW_DNLD);
+
+ /* Send the boot command to device */
+ if (mwifiex_pcie_send_boot_cmd(adapter, skb)) {
+ dev_err(adapter->dev, "Failed to send firmware download command\n");
+ ret = -1;
+ goto done;
+ }
+ /* Wait for the command done interrupt */
+ do {
+ if (mwifiex_read_reg(adapter, PCIE_CPU_INT_STATUS,
+ &ireg_intr)) {
+ dev_err(adapter->dev, "%s: Failed to read "
+ "interrupt status during "
+ "fw dnld.\n", __func__);
+ ret = -1;
+ goto done;
+ }
+ } while ((ireg_intr & CPU_INTR_DOOR_BELL) ==
+ CPU_INTR_DOOR_BELL);
+ offset += txlen;
+ } while (true);
+
+ dev_dbg(adapter->dev, "info:\nFW download over, size %d bytes\n",
+ offset);
+
+ ret = 0;
+
+done:
+ dev_kfree_skb_any(skb);
+ return ret;
+}
+
+/*
+ * This function checks the firmware status in card.
+ *
+ * The winner interface is also determined by this function.
+ */
+static int
+mwifiex_check_fw_status(struct mwifiex_adapter *adapter, u32 poll_num)
+{
+ int ret = 0;
+ u32 firmware_stat, winner_status;
+ u32 tries;
+
+ /* Mask spurios interrupts */
+ if (mwifiex_write_reg(adapter, PCIE_HOST_INT_STATUS_MASK,
+ HOST_INTR_MASK)) {
+ dev_warn(adapter->dev, "Write register failed\n");
+ return -1;
+ }
+
+ dev_dbg(adapter->dev, "Setting driver ready signature\n");
+ if (mwifiex_write_reg(adapter, REG_DRV_READY, FIRMWARE_READY_PCIE)) {
+ dev_err(adapter->dev, "Failed to write driver ready signature\n");
+ return -1;
+ }
+
+ /* Wait for firmware initialization event */
+ for (tries = 0; tries < poll_num; tries++) {
+ if (mwifiex_read_reg(adapter, PCIE_SCRATCH_3_REG,
+ &firmware_stat))
+ ret = -1;
+ else
+ ret = 0;
+ if (ret)
+ continue;
+ if (firmware_stat == FIRMWARE_READY_PCIE) {
+ ret = 0;
+ break;
+ } else {
+ mdelay(100);
+ ret = -1;
+ }
+ }
+
+ if (ret) {
+ if (mwifiex_read_reg(adapter, PCIE_SCRATCH_3_REG,
+ &winner_status))
+ ret = -1;
+ else if (!winner_status) {
+ dev_err(adapter->dev, "PCI-E is the winner\n");
+ adapter->winner = 1;
+ ret = -1;
+ } else {
+ dev_err(adapter->dev, "PCI-E is not the winner <%#x, %d>, exit download\n",
+ ret, adapter->winner);
+ ret = 0;
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * This function reads the interrupt status from card.
+ */
+static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
+{
+ u32 pcie_ireg;
+ unsigned long flags;
+
+ if (!mwifiex_pcie_ok_to_access_hw(adapter))
+ return;
+
+ if (mwifiex_read_reg(adapter, PCIE_HOST_INT_STATUS, &pcie_ireg)) {
+ dev_warn(adapter->dev, "Read register failed\n");
+ return;
+ }
+
+ if ((pcie_ireg != 0xFFFFFFFF) && (pcie_ireg)) {
+
+ mwifiex_pcie_disable_host_int(adapter);
+
+ /* Clear the pending interrupts */
+ if (mwifiex_write_reg(adapter, PCIE_HOST_INT_STATUS,
+ ~pcie_ireg)) {
+ dev_warn(adapter->dev, "Write register failed\n");
+ return;
+ }
+ spin_lock_irqsave(&adapter->int_lock, flags);
+ adapter->int_status |= pcie_ireg;
+ spin_unlock_irqrestore(&adapter->int_lock, flags);
+
+ if (pcie_ireg & HOST_INTR_CMD_DONE) {
+ if ((adapter->ps_state == PS_STATE_SLEEP_CFM) ||
+ (adapter->ps_state == PS_STATE_SLEEP)) {
+ mwifiex_pcie_enable_host_int(adapter);
+ if (mwifiex_write_reg(adapter,
+ PCIE_CPU_INT_EVENT,
+ CPU_INTR_SLEEP_CFM_DONE)) {
+ dev_warn(adapter->dev, "Write register"
+ " failed\n");
+ return;
+
+ }
+ }
+ } else if (!adapter->pps_uapsd_mode &&
+ adapter->ps_state == PS_STATE_SLEEP) {
+ /* Potentially for PCIe we could get other
+ * interrupts like shared. Don't change power
+ * state until cookie is set */
+ if (mwifiex_pcie_ok_to_access_hw(adapter))
+ adapter->ps_state = PS_STATE_AWAKE;
+ }
+ }
+}
+
+/*
+ * Interrupt handler for PCIe root port
+ *
+ * This function reads the interrupt status from firmware and assigns
+ * the main process in workqueue which will handle the interrupt.
+ */
+static irqreturn_t mwifiex_pcie_interrupt(int irq, void *context)
+{
+ struct pci_dev *pdev = (struct pci_dev *)context;
+ struct pcie_service_card *card;
+ struct mwifiex_adapter *adapter;
+
+ if (!pdev) {
+ pr_debug("info: %s: pdev is NULL\n", (u8 *)pdev);
+ goto exit;
+ }
+
+ card = (struct pcie_service_card *) pci_get_drvdata(pdev);
+ if (!card || !card->adapter) {
+ pr_debug("info: %s: card=%p adapter=%p\n", __func__, card,
+ card ? card->adapter : NULL);
+ goto exit;
+ }
+ adapter = card->adapter;
+
+ if (adapter->surprise_removed)
+ goto exit;
+
+ mwifiex_interrupt_status(adapter);
+ queue_work(adapter->workqueue, &adapter->main_work);
+
+exit:
+ return IRQ_HANDLED;
+}
+
+/*
+ * This function checks the current interrupt status.
+ *
+ * The following interrupts are checked and handled by this function -
+ * - Data sent
+ * - Command sent
+ * - Command received
+ * - Packets received
+ * - Events received
+ *
+ * In case of Rx packets received, the packets are uploaded from card to
+ * host and processed accordingly.
+ */
+static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
+{
+ int ret;
+ u32 pcie_ireg = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&adapter->int_lock, flags);
+ /* Clear out unused interrupts */
+ adapter->int_status &= HOST_INTR_MASK;
+ spin_unlock_irqrestore(&adapter->int_lock, flags);
+
+ while (adapter->int_status & HOST_INTR_MASK) {
+ if (adapter->int_status & HOST_INTR_DNLD_DONE) {
+ adapter->int_status &= ~HOST_INTR_DNLD_DONE;
+ if (adapter->data_sent) {
+ dev_dbg(adapter->dev, "info: DATA sent Interrupt\n");
+ adapter->data_sent = false;
+ }
+ }
+ if (adapter->int_status & HOST_INTR_UPLD_RDY) {
+ adapter->int_status &= ~HOST_INTR_UPLD_RDY;
+ dev_dbg(adapter->dev, "info: Rx DATA\n");
+ ret = mwifiex_pcie_process_recv_data(adapter);
+ if (ret)
+ return ret;
+ }
+ if (adapter->int_status & HOST_INTR_EVENT_RDY) {
+ adapter->int_status &= ~HOST_INTR_EVENT_RDY;
+ dev_dbg(adapter->dev, "info: Rx EVENT\n");
+ ret = mwifiex_pcie_process_event_ready(adapter);
+ if (ret)
+ return ret;
+ }
+
+ if (adapter->int_status & HOST_INTR_CMD_DONE) {
+ adapter->int_status &= ~HOST_INTR_CMD_DONE;
+ if (adapter->cmd_sent) {
+ dev_dbg(adapter->dev, "info: CMD sent Interrupt\n");
+ adapter->cmd_sent = false;
+ }
+ /* Handle command response */
+ ret = mwifiex_pcie_process_cmd_complete(adapter);
+ if (ret)
+ return ret;
+ }
+
+ if (mwifiex_pcie_ok_to_access_hw(adapter)) {
+ if (mwifiex_read_reg(adapter, PCIE_HOST_INT_STATUS,
+ &pcie_ireg)) {
+ dev_warn(adapter->dev, "Read register failed\n");
+ return -1;
+ }
+
+ if ((pcie_ireg != 0xFFFFFFFF) && (pcie_ireg)) {
+ if (mwifiex_write_reg(adapter,
+ PCIE_HOST_INT_STATUS, ~pcie_ireg)) {
+ dev_warn(adapter->dev, "Write register"
+ " failed\n");
+ return -1;
+ }
+ adapter->int_status |= pcie_ireg;
+ adapter->int_status &= HOST_INTR_MASK;
+ }
+
+ }
+ }
+ dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n",
+ adapter->cmd_sent, adapter->data_sent);
+ mwifiex_pcie_enable_host_int(adapter);
+
+ return 0;
+}
+
+/*
+ * This function downloads data from driver to card.
+ *
+ * Both commands and data packets are transferred to the card by this
+ * function.
+ *
+ * This function adds the PCIE specific header to the front of the buffer
+ * before transferring. The header contains the length of the packet and
+ * the type. The firmware handles the packets based upon this set type.
+ */
+static int mwifiex_pcie_host_to_card(struct mwifiex_adapter *adapter, u8 type,
+ struct sk_buff *skb,
+ struct mwifiex_tx_param *tx_param)
+{
+ if (!adapter || !skb) {
+ dev_err(adapter->dev, "Invalid parameter in %s <%p, %p>\n",
+ __func__, adapter, skb);
+ return -1;
+ }
+
+ if (type == MWIFIEX_TYPE_DATA)
+ return mwifiex_pcie_send_data(adapter, skb);
+ else if (type == MWIFIEX_TYPE_CMD)
+ return mwifiex_pcie_send_cmd(adapter, skb);
+
+ return 0;
+}
+
+/*
+ * This function initializes the PCI-E host memory space, WCB rings, etc.
+ *
+ * The following initializations steps are followed -
+ * - Allocate TXBD ring buffers
+ * - Allocate RXBD ring buffers
+ * - Allocate event BD ring buffers
+ * - Allocate command response ring buffer
+ * - Allocate sleep cookie buffer
+ */
+static int mwifiex_pcie_init(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ int ret;
+ struct pci_dev *pdev = card->dev;
+
+ pci_set_drvdata(pdev, card);
+
+ ret = pci_enable_device(pdev);
+ if (ret)
+ goto err_enable_dev;
+
+ pci_set_master(pdev);
+
+ dev_dbg(adapter->dev, "try set_consistent_dma_mask(32)\n");
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(adapter->dev, "set_dma_mask(32) failed\n");
+ goto err_set_dma_mask;
+ }
+
+ ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (ret) {
+ dev_err(adapter->dev, "set_consistent_dma_mask(64) failed\n");
+ goto err_set_dma_mask;
+ }
+
+ ret = pci_request_region(pdev, 0, DRV_NAME);
+ if (ret) {
+ dev_err(adapter->dev, "req_reg(0) error\n");
+ goto err_req_region0;
+ }
+ card->pci_mmap = pci_iomap(pdev, 0, 0);
+ if (!card->pci_mmap) {
+ dev_err(adapter->dev, "iomap(0) error\n");
+ goto err_iomap0;
+ }
+ ret = pci_request_region(pdev, 2, DRV_NAME);
+ if (ret) {
+ dev_err(adapter->dev, "req_reg(2) error\n");
+ goto err_req_region2;
+ }
+ card->pci_mmap1 = pci_iomap(pdev, 2, 0);
+ if (!card->pci_mmap1) {
+ dev_err(adapter->dev, "iomap(2) error\n");
+ goto err_iomap2;
+ }
+
+ dev_dbg(adapter->dev, "PCI memory map Virt0: %p PCI memory map Virt2: "
+ "%p\n", card->pci_mmap, card->pci_mmap1);
+
+ card->cmdrsp_buf = NULL;
+ ret = mwifiex_pcie_create_txbd_ring(adapter);
+ if (ret)
+ goto err_cre_txbd;
+ ret = mwifiex_pcie_create_rxbd_ring(adapter);
+ if (ret)
+ goto err_cre_rxbd;
+ ret = mwifiex_pcie_create_evtbd_ring(adapter);
+ if (ret)
+ goto err_cre_evtbd;
+ ret = mwifiex_pcie_alloc_cmdrsp_buf(adapter);
+ if (ret)
+ goto err_alloc_cmdbuf;
+ ret = mwifiex_pcie_alloc_sleep_cookie_buf(adapter);
+ if (ret)
+ goto err_alloc_cookie;
+
+ return ret;
+
+err_alloc_cookie:
+ mwifiex_pcie_delete_cmdrsp_buf(adapter);
+err_alloc_cmdbuf:
+ mwifiex_pcie_delete_evtbd_ring(adapter);
+err_cre_evtbd:
+ mwifiex_pcie_delete_rxbd_ring(adapter);
+err_cre_rxbd:
+ mwifiex_pcie_delete_txbd_ring(adapter);
+err_cre_txbd:
+ pci_iounmap(pdev, card->pci_mmap1);
+err_iomap2:
+ pci_release_region(pdev, 2);
+err_req_region2:
+ pci_iounmap(pdev, card->pci_mmap);
+err_iomap0:
+ pci_release_region(pdev, 0);
+err_req_region0:
+err_set_dma_mask:
+ pci_disable_device(pdev);
+err_enable_dev:
+ pci_set_drvdata(pdev, NULL);
+ return ret;
+}
+
+/*
+ * This function cleans up the allocated card buffers.
+ *
+ * The following are freed by this function -
+ * - TXBD ring buffers
+ * - RXBD ring buffers
+ * - Event BD ring buffers
+ * - Command response ring buffer
+ * - Sleep cookie buffer
+ */
+static void mwifiex_pcie_cleanup(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+ struct pci_dev *pdev = card->dev;
+
+ mwifiex_pcie_delete_sleep_cookie_buf(adapter);
+ mwifiex_pcie_delete_cmdrsp_buf(adapter);
+ mwifiex_pcie_delete_evtbd_ring(adapter);
+ mwifiex_pcie_delete_rxbd_ring(adapter);
+ mwifiex_pcie_delete_txbd_ring(adapter);
+ card->cmdrsp_buf = NULL;
+
+ dev_dbg(adapter->dev, "Clearing driver ready signature\n");
+ if (user_rmmod) {
+ if (mwifiex_write_reg(adapter, REG_DRV_READY, 0x00000000))
+ dev_err(adapter->dev, "Failed to write driver not-ready signature\n");
+ }
+
+ if (pdev) {
+ pci_iounmap(pdev, card->pci_mmap);
+ pci_iounmap(pdev, card->pci_mmap1);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ pci_set_drvdata(pdev, NULL);
+ }
+}
+
+/*
+ * This function registers the PCIE device.
+ *
+ * PCIE IRQ is claimed, block size is set and driver data is initialized.
+ */
+static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
+{
+ int ret;
+ struct pcie_service_card *card = adapter->card;
+ struct pci_dev *pdev = card->dev;
+
+ /* save adapter pointer in card */
+ card->adapter = adapter;
+
+ ret = request_irq(pdev->irq, mwifiex_pcie_interrupt, IRQF_SHARED,
+ "MRVL_PCIE", pdev);
+ if (ret) {
+ pr_err("request_irq failed: ret=%d\n", ret);
+ adapter->card = NULL;
+ return -1;
+ }
+
+ adapter->dev = &pdev->dev;
+ strcpy(adapter->fw_name, PCIE8766_DEFAULT_FW_NAME);
+
+ return 0;
+}
+
+/*
+ * This function unregisters the PCIE device.
+ *
+ * The PCIE IRQ is released, the function is disabled and driver
+ * data is set to null.
+ */
+static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
+{
+ struct pcie_service_card *card = adapter->card;
+
+ if (card) {
+ dev_dbg(adapter->dev, "%s(): calling free_irq()\n", __func__);
+ free_irq(card->dev->irq, card->dev);
+ }
+}
+
+static struct mwifiex_if_ops pcie_ops = {
+ .init_if = mwifiex_pcie_init,
+ .cleanup_if = mwifiex_pcie_cleanup,
+ .check_fw_status = mwifiex_check_fw_status,
+ .prog_fw = mwifiex_prog_fw_w_helper,
+ .register_dev = mwifiex_register_dev,
+ .unregister_dev = mwifiex_unregister_dev,
+ .enable_int = mwifiex_pcie_enable_host_int,
+ .process_int_status = mwifiex_process_int_status,
+ .host_to_card = mwifiex_pcie_host_to_card,
+ .wakeup = mwifiex_pm_wakeup_card,
+ .wakeup_complete = mwifiex_pm_wakeup_card_complete,
+
+ /* PCIE specific */
+ .cmdrsp_complete = mwifiex_pcie_cmdrsp_complete,
+ .event_complete = mwifiex_pcie_event_complete,
+ .update_mp_end_port = NULL,
+ .cleanup_mpa_buf = NULL,
+};
+
+/*
+ * This function initializes the PCIE driver module.
+ *
+ * This initiates the semaphore and registers the device with
+ * PCIE bus.
+ */
+static int mwifiex_pcie_init_module(void)
+{
+ int ret;
+
+ pr_debug("Marvell 8766 PCIe Driver\n");
+
+ sema_init(&add_remove_card_sem, 1);
+
+ /* Clear the flag in case user removes the card. */
+ user_rmmod = 0;
+
+ ret = pci_register_driver(&mwifiex_pcie);
+ if (ret)
+ pr_err("Driver register failed!\n");
+ else
+ pr_debug("info: Driver registered successfully!\n");
+
+ return ret;
+}
+
+/*
+ * This function cleans up the PCIE driver.
+ *
+ * The following major steps are followed for cleanup -
+ * - Resume the device if its suspended
+ * - Disconnect the device if connected
+ * - Shutdown the firmware
+ * - Unregister the device from PCIE bus.
+ */
+static void mwifiex_pcie_cleanup_module(void)
+{
+ if (!down_interruptible(&add_remove_card_sem))
+ up(&add_remove_card_sem);
+
+ /* Set the flag as user is removing this module. */
+ user_rmmod = 1;
+
+ pci_unregister_driver(&mwifiex_pcie);
+}
+
+module_init(mwifiex_pcie_init_module);
+module_exit(mwifiex_pcie_cleanup_module);
+
+MODULE_AUTHOR("Marvell International Ltd.");
+MODULE_DESCRIPTION("Marvell WiFi-Ex PCI-Express Driver version " PCIE_VERSION);
+MODULE_VERSION(PCIE_VERSION);
+MODULE_LICENSE("GPL v2");
+MODULE_FIRMWARE("mrvl/pcie8766_uapsta.bin");
projects / kernel / kernel-generic.git / commitdiff